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Verified answer
1.)⇔x = 50° ( karena sudut keliling )
⇔y = ... ( sudut pusat )
≡ Penyelesaian :
⇒y = 2 × sudut keliling
⇒y = 2 × 50°
⇒y = 100°
2.)
karena z bertolak belakang dengan y , maka :
z = y
100° = 100°